Thought I'd share a couple of my ongoing diy 1911 budget projects. Last month, I finished checkering the front straps of the two 1911's. One has checkering that wraps around the front strap with a slimmed down and checkered, arch mainspring housing. The other has a factory checkered, wedge mainspring housing and checkering that doesn't wrap around. Point is, the wrap around checkering feels better in my hand and I can checker the other 1911 when I feel like it. Beavertail grip safeties, ambi safeties, and short triggers needed to be fitted. I bought a few of the parts at a time and spent less than $100 bucks per order. The upper halves were bought second hand from a forum member and is completely stock.
You can diy this. Other stuff like slide tightening, trigger jobs, oversize bushing and oversize barrel installs would need special tools. And maybe a willingness to f-things up as part of the learning process. I once cracked a colt 38 special slide trying to get a tighter fit. That one hurt.
Anybody want to try the easier stuff, I'd be glad to help. From a prepper's view, the least you should be able to do is fit replacement extractors, imho. That is a wear item.